A 1980
Super Robot series by
Ashi Productions, followed up by a 1981
Toei Animation movie.
A distant planet called S-1 is polluted. Our hero, Marin, is a boy who escaped from S-1's crazed military dictator Zeo Gattler. Unfortunately, before he can do anything about the people trying to overthrow the evironmentalists' hard work at restoration, he is sucked into a time warp and ends up near Earth in 2100. There, he uses his ship to form part of the mighty mecha, Baldios, and joins the rebel military team called the Blue Fixers.
The finale of the series is
unexpectedly soul-crushing. You should know that now. The entire show is downbeat in tone, but the abrupt ending was caused by the fact that it was cut off before it could have the one more season it had been planned. The small fanbase the show gathered made a large upcry about the awful ending, and in the following year, a movie with a "fixer ending" was released by Toei in the holiday season of 1981.
Tropes related to the series: